Sharing over a decade of architecture experience from Baidu, Alibaba, and Tencent.
This guide walks through the most common ElasticSearch commands, covering cluster health checks, index management, document CRUD operations, mapping inspection, full‑text and filtered searches, aggregations, and bulk inserts, while explaining each step with concrete examples and performance tips.
The article defines MySQL deadlocks, illustrates how circular lock waits between transactions cause them, and presents five practical mitigation techniques—consistent lock ordering, shortening transactions, optimizing indexes, breaking large SQL statements into smaller batches, and implementing application‑level retry logic—to reduce deadlock occurrences in high‑concurrency environments.
The article defines Java thread deadlock, illustrates five typical deadlock patterns with diagrams, shows how they cause threads to wait indefinitely, and presents five practical solutions—including consistent lock ordering, reducing nested locks, shrinking lock scope, using timed locks, and adopting lock‑free designs.
This guide lists the most frequently used MySQL commands for checking version, connections, process lists, killing queries, global status, configuration variables, lock waits, slow‑query settings, table sizes, index information, execution plans, and replication status, each with practical usage scenarios.
The article explains why Kafka does not guarantee exactly‑once delivery and presents three practical approaches—business‑level idempotence, manual offset management, and Kafka’s transaction/EOS features—to reliably avoid duplicate message processing.
This article explains Single Sign-On (SSO) fundamentals, detailing its three core components—CAS Server, CAS Client, and Browser—illustrating the overall architecture and walking through the complete authentication flow from accessing a service to ticket validation.
This article offers a comprehensive 2026 overview of Redis commands, organized by function, with clear usage examples, return values, performance notes, and best‑practice recommendations such as avoiding KEYS in production and using SCAN, making it a practical reference for developers and architects.
This guide walks through the nine most frequently used Docker commands for online operations, showing how to list containers, view logs, exec into containers, monitor resource usage, inspect details, manage images, restart services, and clean up unused resources, with practical examples and troubleshooting scenarios.
This article provides a comprehensive, step‑by‑step reference of essential MySQL commands—including connection, database and table creation, data manipulation, schema alteration, and query optimization with EXPLAIN—complete with code examples, parameter explanations, and performance warnings for safe production use.
This article explains MySQL master‑slave replication in detail, covering its role in high‑availability and read/write separation, the core binlog mechanism, typical one‑master‑multiple‑slaves architecture, and the step‑by‑step data flow from write operations on the master to replay on the replicas.
